Author Topic: Percussion talk  (Read 219 times)

0 Members and 1 Guest are viewing this topic.

Offline Allyn T

  • Member
  • Posts: 1,274
  • I'm addicted to information
Percussion talk
« on: January 20, 2023, 10:31:37 pm »
Ok so I've watched a lot of freeze-cracked's videos and he has mentioned before how he sometimes hits into the piece and seems 5o get a minimal bulb of percussion and good flake travel. Now I took that to mean he was hitting into the piece such as at an angle more in than down but now I'm second guessing that and thinking maybe he ment with his bopper swinging in line with the piece rather that catching it with the side. Either way I tried it and seemed to work well. I'm wondering if anyone else has experience with percussion and less bulbing? By the way I'm using a solid copper headed billet, my second largest one with a slowish swing.  Here is the piece.






Also I wanted to say that I've been relying on indirect a lot but it seems like some rock just doesn't like it as much. This piece which is heat treated harvester and a piece of raw Burlington I worked recently both flaked better when I switched back to percussion. This  figuring out what works best on different stone is new to me but the experienced knappers are probably very familiar with what I'm talking about.
In the woods I find my peace

Offline JackCrafty

  • Global Moderator
  • Member
  • Posts: 5,604
  • Sorry Officer, I was just gathering "materials".
Re: Percussion talk
« Reply #1 on: January 23, 2023, 11:10:57 am »
Flakes with little to no bulbs are sometimes called "bending" flakes. They are achieved with a swiping or scraping motion of the billet. I use this method a lot.

https://youtu.be/IDZhfXIfgFE

Any critter tastes good with enough butter on it.

Patrick Blank
Midland, Texas
Youtube: JackCrafty, Allergic Hobbit, Patrick Blank

Where's Rock? Public Waterways, Road Cuts, Landscape Supply, Knap-Ins.
How to Cook It?  200 for 24hrs then 275 to 500 for 4hrs (depending on type), Cool for 12hr

Offline Allyn T

  • Member
  • Posts: 1,274
  • I'm addicted to information
Re: Percussion talk
« Reply #2 on: January 24, 2023, 10:14:48 pm »
Very interesting Patrick, all of my billets are rounded but I do always try to swing through and treat it like a hammer stone. Really no wrist motion. That one I posted in the picture did have a tiny little lip on the platform after it sheared off.
In the woods I find my peace